Machine for making insulator-pins



(Nomadel.) l

W. SNEE. A lMACHINE POR MAKING INSULATOR PINS. No, 297,865. 'Patented Apr. 29, 1884.

Fiyiif' Hl' mV IIIIIIIII'IIIIHH; l'lll upon the insides of the tops of the side rails -been hitherto possible. i

Aare carried the cutters D, said Acutters having vThe function of the cutter F is to form the UNITED STATES t PATENT Ormea.

WILLIAM SNEE, OF VEST ELIZABETH, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO MILTON A. WALTON, OF CAMERON, WEST VIRGINIA.

NIAHINE FOR MAKING lNSULATOR-PINS.

SPECIFICATION `forming part '0f Letters Patent No. 297,865, dated. April 29, 1884.

Application filed January 10, 1884. (No model.) L

To all whom, t may concern.:

Be it known that I, WILLIAM SNEE, a citizen of the United States, residing at West Elizabeth, in thp county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Machines for Turning Insulator-Pins, of which the following is a full, clear, and exact description.

The object of my invention is to provide a simple vand comparatively inexpensive machine, by the use of which insulator-pins may be manufactured with greater celerity than has My invention consists in the means employed to accomplish said object, as hereinafter set forth and claimed.

In the drawings, Figure I represents a top plan view of my improved machine, and Fig. 2 a side elevation of same.

Similar letters of reference indicate corresponding parts throughout the different views.

A represents the frame of the machine, consisting of side and end rails supported upon legs in the ordinary manner. Upon a shaft, l, having bearings in the side rails of themachine, are carried two circular saws, B, set at a distance apart equal to the length of the insulator-pins. Above the'said shaft and ex-V tending upwardly from the front rail is a horizontal feed-table, C. Upon a shaft, d, having bearings in the side rails-in rear of shaft bsuch lineal outline as to adapt them to form the concave surface of the insulator-pin- In rear of shaft dis a third shaft, e, also having bearings in the side rails. Upon said shaft are carried cutters'E, having horizontal edges adapted to shape the stem of the insulator-pin. Near the rear extremity of the machine is a fourth revolving shaft, f. Said shaft carries a worm, F, a cutter, F', carried on a loose sleeve, f', and a spring, F2. The sleeve f and the worm F are keyed to the shaft in such manner as to allow them longitudinal freedom of movement.-

thread upon the concave surface of the pin, and its operation will be hereinafter explained. Sliding lengthwise ofthe table in guides formed is a carriage, G. In one side of said'carriage is borne a short shaft, g, provided with collars upon either side of its bearing, whereby longi tudinal movement is prevented without interfering with the rotary motion. The inner extremity of said shaft is roughened to allow of the pin-blank being centered upon it. In the opposite side of the carriage G is another short shaft, g', which is provided with a collar bevond the outer side of its bearing in the carriage. Against this collar impin'ges a coilspring, g2, whose farther extremity is held in place by a frame, g3, secured to the carriage.

The outer end of the shaft passes through the frame g3,and carries a bevel-disk, gt Attached to one of the side rails is a switch, H, which consists simply of a triangular plate having its base in the direction of the front of the machine. Loosely embracing the shaftpis one end of a rod, K', whose free extremity carries a short pulley-shaft, 7c. Loosely secured to said shaft is a second arm, L, whose farther extremity turns upon the driving-shaft M of the machine. Shafts g, 7c, and M bear upon their extremities pulleys, and,` the object of the arms is to allow continuous motion to be transmitted from the driving-shaft (through the medium of the pulley of shaft k) to shaft g. This is accomplished in the manner shown. The shafts b, d, e, f, and g all bear pulleys up; on their outer extremities, and are connected with the driving-pulley by suitable belts.

The operation of the invention is as follows: The piece of wood of which the insulator-pin is to be made is slid forward to the saws B and cut of a proper length. It is allowed to rest upon the table C, and the carriage G is drawn forward. As said carriage advances, the disk g4 is brought in contact with the outer edge of the switch H, and thereby forced outward, carrying with it the short shaft g.- When the disk has passed to the end of the switch, the shaft g is snapped inwardly by the spring g2,

and the pin-blank, `having been previously i cutters D E the concave and the cylindrical portions of the pin are formed. After pass ing beyond the cutter E ainger, gG, secured to IOO The carriage is then drawn toward the front l of the machine, the shaft g forced outward by by the switch H, the completed pin dropped from the carriage, and the operation repeated as aforesaid.

I am aware that it is not new to hold the longitudinally-movable tail-spindle of a turning-lathe against the blank by a spiral spring and to withdraw it by means of a pin and camgrooved disk; also, that it is not new to use two or more cutting-tools on the same shaft and operating` simultaneously, and then to carry the blank to the polishing devices; but these do not embody my idea of turning off 011e part of the insulator-pin or other blank with the first cutter, and j ust before this ceases its work, causing a second cutter to bite upon the blank; hence Vhat I claim as new and of my invention is- I. In a turning-lathe, the combination of a traveling carriage, blank-centering shafts or spindles, of which one is longitudinally movable on said carriage, and a fixed switch, H, the latter having on its outer side an incline with which the inclined surface of the centering-shafts engage by means of said traveling carriage, substantially as shown and described.

2. In a turning-lathe, the combination,with

a frame, of the shafts (l e, journalcd on the under side, a carriage, G, traversing the upper side, a rotary blank-holder arranged on said carriage, and two rotary cutters arranged diagonally to each other on said shafts, as and for the purpose specified.

3. The combination, with a pin-holder carriage having the finger g, of a rotary shaft,f, carrying the spring -pressed longitudinallymovable worm F, and threading-tool f,where by a spiral thread may be cut on the pin, as described.

4. A machine for making insulator-pins, provided with two revolving saws separated a distance equal to the length of the pin, two revolving cutters placed in rear of said saws, a revolving shaft provided with a laterallysliding cutter and means for laterally moving said cutter, and a carriage sliding lengthwise of the machine and provided with means for receiving, centering, andV revolving the pinblank, all arranged substantially in the manner described, whereby an insulator-pin is completed in a single continuous operation, as set forth.

5. In a turning-lathe, the combination, with a supporting-frame, of a traversing-carriage provided with the blank-holder, two saws to first size the length of pin, two succeeding rotary Shapers. and a spiral threader to act on the previously length sized and shaped pin, substantially as described.

I VILLIAM SNEE. Witnesses:

ROBERT A. LYNCH', JOEL MARTIN. 

